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Igneous rocks are called fire rocks and are formed either underground or above ground. Underground, they are formed when the melted rock, called magma, deep within the earth becomes trapped in small pockets. As these pockets of magma cool slowly underground, the magma becomes igneous rocks.

Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground.

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Q: What is one cause of volcanic activity and igneous rock formation?
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Related questions

Which type of boundaries cause volcanic activity and can result in the formation of the islands?

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Which type of boundaries cause volcanic activity and can result in the formation of islands?

Convergent boundaries, where tectonic plates collide, can cause volcanic activity due to the subduction of one plate beneath another. This process can lead to the formation of volcanic island arcs, such as Japan or the Aleutian Islands.


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The growth of the Hawaiian island chain is primarily due to the movement of the Pacific tectonic plate over a hotspot in the Earth's mantle. As the plate moves, volcanic activity at the hotspot creates new islands, with the oldest islands in the chain found in the northwest and the youngest in the southeast.


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A significant impact to the planet from a large enough asteroid could cause volcanic eruptions.


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